Rotary pivoted hammer



Dec. 4., 192a. I 1,476;'177

H. M. PLAISTED v ROTARY PIVOTED HAMMER Original Filed Nov. 25. 1922 Patented Dec. 2, 1923.

M e WE 1 S? amm 'rLArs'rnn, orsr. Louis, rrrssounr, essrsnoaro wInLIAr/is arnum cRUsHnR AND PULVEBIZEE; contrary, or s'r. Louis, 'wrissou-zar, n' ooaroaar'ron or issouaraornnr rrvornn HAMMER.

ap lication filed iv vember as, 1922, Serial No. 603,316. renewed se tember 19,1923.

To all-whom it mag concern.-

Be it knownthat I, Harrow M. Prnrsrnn, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Rotary Pivoted Hammers, of which the following is aspecification. 1

. This invention relatesito certain new and useful improvements in rotary pivoted hammers, the peculiarities of which will be hereinafter fully described and claimed.

The main objectof this invention is the provision of asuitable reversible block with multipleedges, preferably eight, so clamped adjustably and inserted in. the head end of a suitable shank that only one cutting edge at a time is presented in its front operative position; secondly, to provide means .for

' securingsaid block in each. adjusted position; thirdly, to provide a hammer face in front of the operative edge of the block adapted to break up the larger lumps of the -material bein reduced, prior to its finer reduction'by t e operative edge of the block;

26 and fourthly, to provide means to expose successively to the material but one operative edge of the block by each adjustment,

and thereby protect the otherxedges from v plate 3 are inclined to the radial neutral axis unnecessary wear. In the accompanying drawing on which like reference numerals indicate corresponding parts, Fig. 1. represents a side view of ahammer exemplifying my invention; Fig. 2, a front view of the same; Fig. 3, a back view; Fig. 4, adetail view in cabinet perspective of one member of my jaw clamp for the block; and Fig. 5, a similar view of the preferred form of the block itself.

The numeral 1 designates the shank of a suitable rotary! pivoted; hammer provided at one end with an eye 2 for pivotal mounting, and providedat the head-end with a twopart ic1amp-;-..0 eraive1y I connected. member of this clamp consists, of a head 4 nearly to the outer operative edge 12 of the One.

plate 3, strengthened in the rear by a web' 1 to constitute leight operative edges succes sively when adjustably mounted betweenthe jaw faces 3 and 6. i

Inthe center of rear faces areprovided' with a square or other angular opening 8, preferably extend-1 ing through the block as shown in Fig.5. The jaw faces 3 and 6, preferably both of them, are provided with square or angular dowels 9 and 10 respectively, that register with the central opening 8 of the block when the block? the front and i in clamping position,and not only hold the block from leaving the recess between-the jaw faces, but prevent turning the block rotatably when the clamp is closed. The bottom plate 5 likewise prevents rotation of the block until the block is so-wornaway under successive adjustments, that the square dowels are depended on'to prevent suchrota tion.

The jaw plate 6 is. cut away betweenthe side edges so as to expose a portion of the front "face of the block'7, but has upwardly projecting horns 11 at the sides that extend '80 block, and thus protect the side edges of the block from. unnecessary wear by the material being reduced. The plate 6, andopposing X through the pivot of the hammer and the center of gravity of the hammer as shown in Fig. 1, so that the operative edge 12 is a further radial distancefrom the pivot than the rear edge 18, giving clearance tothe end: of the block when the hammer is operated in i the usual arcuate cage of a crusher. The

plate 6 has a forward projection 1 f extending downward and presenting a hammer face 15 that serves to breakup the larger lumps of the'material being reduced, and

then the inclined surface shown deflects it catch consisting of a flat spring 19 hidden withinfthe slot and engaged by one end to one member, such as the arm 16, while the other end of the spring inclines across the meeting faces into engagement with a notch in the other member, which in this case is the slottedmember. A hole 21 trans- -versely through the slotted member and opposite the end of the spring, allows of inserting tapered pin to lift the spring out of the notch in order to withdrawthe arm from the slot and open the clamp, which will allow of changing the block to bring another operative face into operative position. Another method of fastening the arm is by a taper pin, or cotter, through a hole 22 at the rear I end of the arm. This Inethodmay be used alone, or in addition to the spring catch to affordextra security in fastening the jaws forming the opposing part of the jaw clamp,

a block having a plurality of-operative edges at front and back face and adjustably mounted in said jaw clamp, and means to fasten the jaws together;

2. A rotary pivoted hammer comprising a shank adapted for pivotal mounting at one 7 end, and having a plate at the head end forming one part of the jaw clamp,'said head having aslot' below said plate,an opposing 'jaw forming the other part of the aw clamp and having an 7 arm slidably mounted in said "slot, a blookhaving a pluralityof operative edges at front and back and adjustably mounted in the jaw clamp, and means to fasten the clamp together in any adjusted position of said block.

3. Arotary pivoted hammer comprising a head having a jaw fac'e-plateand a transverse slot below said face plate, an op- (posing jaw face-plate having anarm slidably mounted in said slot, a block adjustably mounted between said jaw plates, and

a springcatch detachably holding said arm in said slot.

4. A rotary pivoted hammer comprising a head provided with a. jaw clamp having parallel jaw faces, 7 an adjustable block m0'unted between said jaw faces, and means to secure said ,clamp,'said block beingre- 'posit'ion of the block.

signature.

" A A o nMI-rLmsr n; I

tained in said clamp by dowel andrecessengagement between; the adjacent faces of block and clamp.

5. A rotary pivoted hammer comprising a clamping head and a flat adjustableblock with 'multiple operative edged-the front member of said head being cut away to ex pose the outer edge'of said; block and aportion of the front ,face; and having horns at the side j protecting the side edges of the block beyond the intermediate cut away portion, substantially as described.

6. A rotary pivoted hammer comprisinga clamping head of two 'members,one'memher being slidably mounted in aslot in the other member -a fiat spring mounted' on one member and hidden in said slot and adapted to engage a notch in the other member,the slotted member having a hole opposite the said spring whereby the spring;

can be disengaged. I

7 A rotary pivoted hammercomprising a two-part jaw clamp head consisting of two jaw face-plates slidably adjustable to and from each other and provided .with

square dowels in opposing faces, and a flat adjustable block having a square central hole registering with said dowelsineach adjusted 8. A rotary pivoted hammer comprising a shank adapted for pivotal mounting at one I end and having a two-part'jaw clamphead with opposing 'j aw faces, 'and'a block adjustably mounted between said tfaces,-t'he' said I jaw faces being located in planes inclined to the radial neutral axis of said hammer to bring the operative edge of the block a. fur ther radial distance from the pivot than the adjacent rear edge of said block.

9. A rotary pivoted hammer comprising a shank adapted for pivotal mounting at one end and having a two-part aw clamp head,.

and a block adjustably mounted in said head,-one jaw member having a forward of and at a lesser radial distance from the pivot than the operative edge of saidblock, substantially as and for the purpose described.

In'testimony whereof'I have afiixedmy project-ion forming a hammer-face in front 7 

